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Conceptual design of heterogeneous azeotropic distillation process for ethanol dehydration using 1-butanol as entrainer |
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| รหัสดีโอไอ | |
| Creator | Paritta Prayoonyong |
| Title | Conceptual design of heterogeneous azeotropic distillation process for ethanol dehydration using 1-butanol as entrainer |
| Publisher | Maejo University |
| Publication Year | 2557 |
| Journal Title | Maejo International Journal of Science and Technology |
| Journal Vol. | 8 |
| Journal No. | 3 |
| Page no. | 334 |
| Keyword | ethanol dehydration,heterogeneous azeotropic distillation,1-butanol,entrainer |
| ISSN | 1905-7873 |
| Abstract | The synthesis of a heterogeneous azeotropic distillation process for ethanol dehydration using 1-butanol as entrainer is presented. The residue curve map of the ethanol/water/1-butanol mixture is computationally generated using non-random twoliquid thermodynamic model. It is found that 1-butanol leads to a residue curve map topological structure different from that generated by typical entrainers used in ethanol dehydration. Synthesised by residue curve map analysis, the distillation flowsheet for ethanol dehydration by 1-butanol comprises a double-feed column integrated with an overhead decanter and a simple column. The double-feed column is used to recover water as the top product, whereas the simple column is used for recovering ethanol and 1- butanol. The separation feasibility and the economically near-optimal designs of distillation columns in the flowsheet are evaluated and identified by using the boundary value design method. The distillation flowsheet using 1-butanol is compared with the conventional process using benzene as entrainer. Based on their total annualised costs, the ethanol dehydration process using 1-butanol is less economically attractive than the process using benzene. However, 1-butanol is less toxic than benzene. |
